Power Electronic CircuitsLaajuus (3 ECTS)

Objective

This course is an introduction to power electronic circuits of electric drives. After completion of course the student understands the power electronic circuits of power electronic components and the student knows the practical applications. He is able to evaluate how the various circuits work. The student is able to assess how the different circuits modify the available voltage to create the desired voltage. The student is able to choose the right circuit to a particular application.

The contents and the assessment criteria of the course may be different depending on the teacher of the course.

Content

1. Power rectifiers and inverters
2. Different loads
3. Free-wheeling diode and half-controlled bridges
4. Filtering of DC current and DC voltage
5. Commutation
6. Harmonics and Reactive Power
7. Filtering of harmonics

Assessment criteria, satisfactory (1)

1. The student identifies the most common power rectifiers and inverters
2. The student understands how different loads affect the operation of the circuit
3. The student understands how free-wheeling diode and half-controlled structures affect the operation of a circuit
4. The student understands how DC current and voltage can be filtered
5. The student understands commutation
6. The student understands what disadvantages the rectifiers and inverters cause to the network
7. The student understands how to filter harmonics

Assessment criteria, good (3)

1. The student will be able to describe the voltage at the most common rectifier and inverter outputs. The student is able to calculate the average of the rectified voltage
2. As level 1
3. As level 1
4. The student is able to design a rectifier in order to achieve a sufficiently stable direct current and voltage
5. The student is able to analyze the operation of a commutation circuit and how commutation affects the DC-voltage curve and the average of the DC voltage
6. The student is able to assess how the reactive power can be compensated
7. As level 1

Assessment criteria, excellent (5)

1. The student will be able to choose the right bridges depending on the direction of power flow
2. As level 1
3. As level 1
4. As level 1
5. As level 3
6. As level 3
7. As level 1